If you apply a force to a brittle material, it WILL NOT deform plastically. However if there is enough force applied it will suddenly snap, they are also quite weak if they have cracks in them. e.g a chocolate bar is a brittle material - Break individual chunks of chocolate without the whole bar changing shape. Also ceramics (glass) shatter.

What is meant by the term ductile?

- You can change the shape of ductile materials

- They keep their shape when there deformed in this way.

- An example of a ductile material is copper

- Ideal for electric wires

What is meant by the term malleable?

- Their shape can be changed fairly easily e.g hammering or rolling

- Malleable materials will not keep their strength

- Gold is an exaple of a malleable metal

What is meant by the term hard?

They are very resistant to cutting, indentation and abrasion

- They can be used as cutting tools often made by harden steel and diamond